The invention relates to a method for preparing a concentrate of denatured
whey protein aggregate preferably having a mean aggregate size (median) of
between 1 and 4 .mu.m. Said method consists of the following steps: a) an
aqueous solution enriched to a maximum protein content of 4% by weight,
containing whey protein and having a pH of between 5.0 and 7.0 is
thermally denatured to [.ltoreq.80%] .ltoreq.90%, in relation to the
protein content, under substantially non-shear conditions at a temperature
of between 75 and 150.degree. C. and by means of a holding period; and b)
the resulting product is concentrated, preferably to a denatured whey
protein concentration of between 5 and 20%.
